code: def test_lch(self):
      # Test LCH.
      self.assertEqual(
          S("person.n.01").lowest_common_hypernyms(S("dog.n.01")),
          [S("organism.n.01")],
      )
      self.assertEqual(
          S("woman.n.01").lowest_common_hypernyms(S("girlfriend.n.02")),
          [S("woman.n.01")],
      )
  
file_path: nltk/nltk/test/unit/test_wordnet.py
imports: import unittest
  from nltk.corpus import wordnet
  from nltk.corpus import wordnet_ic
label_desc: Use image node_id 8 for calling the WordnNetDemo obj's underlying member method code with example usage: obj.test_lch() without return types